做了3年开发了，最近发现基础还是很重要，应该是深博，而不是博深，陆续贴点基础类
记录日志
using System;
using System.IO;
using System.Text;namespace TestForLogfile
{
public class LogFile
{
//private static readonly string LogFileName = ConfigurationManager.AppSettings["LogFile"];
private static readonly string LogFileName = "TestLogFile";public static void LogInfo(string sLogInfo, LogType type)
{
try
{
string logLevelType = GetStringLogType(type);
var sb
= new StringBuilder();
sb.Append(DateTime.Now.ToString("MM/dd HH:mm:ss "));
sb.Append(" ");
sb.Append(logLevelType);
sb.Append(" ");
sb.Append(sLogInfo); var filePathAndName
=
string.Format("{0}AppLog\\{1}.txt", AppDomain.CurrentDomain.BaseDirectory, LogFileName);//write to file TecNodeService.log
using (var fs = File.Open(filePathAndName, FileMode.Append, FileAccess.Write, FileShare.Write))
{
var logFileSW = new StreamWriter(fs);
logFileSW.WriteLine(sb.ToString());
logFileSW.Close();
fs.Close();
} }
catch (Exception ex)
{
//write to file TecNodeServiceErr.txt
string errFilePathAndName = string.Format("{0}{1}", AppDomain.CurrentDomain.BaseDirectory, LogFileName);try
{
var fs = File.Open(errFilePathAndName, FileMode.Append, FileAccess.Write, FileShare.Write);
var logFileSW = new StreamWriter(fs);
logFileSW.WriteLine(ex.Message);
logFileSW.Close();
fs.Close();
}
catch
{
}
}
}private static string GetStringLogType(LogType type)
{
string logLevelType;switch (type)
{
case LogType.Trace:
{
logLevelType = "Trace";
break;
}
case LogType.Info:
{
logLevelType = "Info";
break;
}
case LogType.Warning:
{
logLevelType = "Warning";
break;
}
case LogType.Error:
{
logLevelType = "Error";
break;
}
case LogType.Start:
{
logLevelType = "Start";
break;
}
case LogType.Stop:
{
logLevelType = "Stop";
break;
}
default:
{
logLevelType = "Unknown";
break;
}
}
return logLevelType;
}public static void RenameLogFile(int numCopy)
{
//find the location of log file
string baseDirPath = AppDomain.CurrentDomain.BaseDirectory;
string logPath = baseDirPath + "AppLog";
if (!Directory.Exists(logPath))
{
// Create log file
Directory.CreateDirectory(logPath);
}// logfile path
string logFile = string.Format("{0}AppLog\\{1}.txt", baseDirPath, LogFileName);
FileInfo logFileInfo = new FileInfo(logFile);
if (logFileInfo.Exists)
{
// recursive rename
RecursiveRenameFile(logFile, numCopy);
logFileInfo.Delete();
}
}private static void RecursiveRenameFile(string fullName, int numCopy)
{
var logFileInfo = new FileInfo(fullName);
try
{
if (logFileInfo.Exists)
{
//For example: TestLogFile2.txt
int iLastDotPos = fullName.LastIndexOf('.'); //13
int iFileNamePos = fullName.LastIndexOf(LogFileName); //0
int iStartNumPos = iFileNamePos + LogFileName.Length;
string nextFilePathAndName;
int iSeqNum;
if (iStartNumPos == iLastDotPos)
{
iSeqNum = 1;
nextFilePathAndName = fullName.Substring(0, iStartNumPos) + iSeqNum + ".txt";
}
else
{
iSeqNum = Int32.Parse(fullName.Substring(iStartNumPos, iLastDotPos - iStartNumPos)) + 1;
nextFilePathAndName = fullName.Substring(0, iStartNumPos) + iSeqNum + ".txt";
}if (iSeqNum < numCopy)
{
RecursiveRenameFile(nextFilePathAndName, numCopy);
}
logFileInfo.CopyTo(nextFilePathAndName, true);
}
}
catch (Exception ex)
{
LogInfo(ex.Message, LogType.Error);
}
}
}public enum LogType
{
Trace = 0,
Info,
Warning,
Error,
Start,
Stop,
Unknown
}
}
调用很简单
//9表示保留9个日志文件，循环向后拷贝
LogFile.RenameLogFile(9);
// 记录日志内容
LogFile.LogInfo("test", LogType.Error);
